Power plants – Motor operated by expansion and/or contraction of a unit of... – Unit of mass is a gas which is heated or cooled in one of a...
Reexamination Certificate
2004-10-13
2009-02-17
Nguyen, Hoang M (Department: 3748)
Power plants
Motor operated by expansion and/or contraction of a unit of...
Unit of mass is a gas which is heated or cooled in one of a...
C060S521000
Reexamination Certificate
active
07490468
ABSTRACT:
This invention relates to a method of operating an engine and, particularly to a method of determining the pressure of a working gas within a Stirling engine of a domestic combined heat and power unit relative to a pre-defined pressure. The present invention provides a method of determining the pressure of a gas within an engine relative to a pre-defined pressure of the gas, comprising measuring the power factor of electricity generated by the engine, comparing the measured power factor with a power factor determined to correspond to the power factor of electricity generated by the engine when operating at the pre-defined pressure and determining whether the measured power factor is less than the determined power factor. Variations in measured power factors may also be used to indicate faults in the engine.
REFERENCES:
patent: 3303348 (1967-02-01), Cox et al.
patent: 3660583 (1972-05-01), Takanasi et al.
patent: 4601172 (1986-07-01), Stotts
patent: 4873826 (1989-10-01), Dhar
patent: 4885653 (1989-12-01), Kato
patent: 4891569 (1990-01-01), Light
patent: 5203170 (1993-04-01), Naito
patent: 5442271 (1995-08-01), Hatanaka et al.
patent: 6282895 (2001-09-01), Johansson et al.
patent: 2002/0002826 (2002-01-01), Fahringer et al.
patent: 0297718 (1989-01-01), None
patent: 1689995 (2006-08-01), None
patent: 119490 (1989-08-01), None
patent: WO 2005/040588 (2005-05-01), None
European Office Action dated Oct. 31, 2007.
Cooper James Edward
Francis George McChesney
Parsons John Andrew
Ranzetta Nicola Jane
Ballard Spahr Andrews & Ingersoll LLP
Microgen Enery Limited
Nguyen Hoang M
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